John b



(No Model.)

J. B. CLOT.

AIR OR GAS OOMPRESSING PUMP. No. 325,395. Patented Sept. 1, 1885.

N. PETERS. Phole'lmhngmphni Wash-onion. IJv c UNITED STATES PATENT @rrrcn.

JOHN B. GLOT, OF SAN FRANCISCO, CALIFORNIA.

AIR OR GAS COMPRESSING PUMP.

SPECIFICATION forming part of Letters Patent No. 325,395, dated September 1, 1 885v (No model.)

To (6U whom, it may concern:

Be it known that I, J our: B. CLo'r, a citizen of the United States, and residing at the city and county of San Francisco, and State of California, have invented a new and useful Improvement in Pumps for Compressing Air or Gas, more especially for such pumps as are used in ice or refrigerating machines, of which the following is a specification.

My invention relates to improvementsin air or gas compressing pumps in which a lubricating-fluid is contained within the cylinder to be lubricated, the fluid being in large quantities, so that the supply of the lubricant is used over and over again.

The object of this invention is to lubricate the cylinders, pistons, and piston-rods of air or gas compressing pumps, and at the same time to cool the lubricating-fluid, so that itshall aid in keeping the cylinder cool from the effects of compressing air or gas, and in accomplishing this to use the least practicable quantity of lubricant consistent with a proper reduction of friction of wearing parts; also, to have a continuous circulation of the lubricating-fluid from one cylinder to another in two combined single-acting compressing-pumps for the pur pose before stated, and, in addition, to cool the lubricating-liquid by means of surfaceoontact in passing from one cylinder to the other. By this method of construction and arrangement of parts a much less quantity of lubricant is required, and while protected from the influence of the atmosphere is yetunder but little more than atmospheric pressure.

The drawing herewith presented and forming a part of this specification,will enable any one skilled in the art to which my invention appertains to construct a gas or air compress ing pump which will easily perform the duties required of it, and with the least care be kept well lubricated and cooled in its internal. acting parts.

In the drawing, A A are the two single-act ing inverted cylinders with pistons B B, pis ton-rods G G, inlet and outlet valves D D D D for the air or gas which is to be compressed or is being compressed; E E, the stuffing-boxes for packing the pistonrods; F, a connectingchannel between thelower ends of the two cylinders, and G a chamber surrounding a part of the channel, through which chamber G passes the gas or air on its way to the pump to be compressed. These pipes connecting the chamber G to theinlet-valves of the pump may be of any convenient and desired form which is well known.

The pipe H leading from the chamber G to the refrigerator is such as is in commoiruse for this purpose.

The cylinders, pistons, and valves of this pump may be of any well-known construction adapted for the purpose, the principal feature of myinvention being the connecting together the two lower ends of the single-acting cylinders, forming an unobstructed communication one with the other, so that the movement of the pistons being coincident but in opposite directions the space between the under sides of the pistons will remain practically constant in volume, and any fluid or liquid occupying this space will be alternately drawn and forced into each cylinder when being displaced from the other. This space is filled with any lubricating-liquid adapted for the purpose, and in the operation of the pistons will follow each piston in its upward movement, thoroughly lubrieating the inner walls of the cylinders and abstracting from them the heat which the walls have received from the compressed gas or air. As the piston descends, it forces the lubricant under it through the connecting-channel F, which issurrounded by the chamberG, (through which is passing the cold gas or air on its way to the inlet-valve of the pumps,) thus releasing the heat which the lubricating-liquid had absorbed from the walls of the cylinder which it just left, and preparing it to lubricate and absorb the heat from the cylinder which it enters on the upward stroke of the piston in the second cylinder.

The pistons may be operated by any of the well-known means, as by a shaft having cranks set opposite each other and having an inverted steam-cylinder between them, in which case the connecting channel F will be carried around the steam cylinder, or by a horizontal steam-cylinder, or by a beam which may be moved by a crank on a distant shaft.

Any loss byleakage of the lubricant around the piston-rods and through the stuffing-boxes can be made good through the pipe and cock J, into the funnel top of which the required amount can be poured, this pipe reaching a ICO little higher than theunder side of the pistons when at their highest point.

Should the pistons B B leak some of the gas or air when at its greatest degree of compression, thus creating an undue pressure on the lubricating-fluid, I provide the lightly-loaded valves K K, which will rise with any predetermined pressure and allow the gas or air to return above the pistons during the descent when the gas or air above them is at its lowest tension.

The proportions of the chamber G to the channel Fwill be determined by the comparative temperatures of the compressed and uncompressed gases passing through, or of such a quantity of coolingsurface in G that the heat absorbed by the lubricant from the walls of the cylinder may be easily taken up by the gas or air passing through the chamber G.

I am aware that prior to my invention pumps have been lubricated byliquid which was contai'nedin each cylinder by itself and into which the piston dipped at the bottom of its stroke, and also that pistons and cylinders have been lubricated by passing a small quantity upward "or downward through the piston at each strol; e

but these I do not claim.

\Vhat I claim, and desire to secure by Letters Patent, is

1. In a gas or air compressing pump, the combination of the two cylinders A A, the pistons B B,with a connecting-channel, F, the inlet and outlet-valves D D D D, the chamber G, the pipe and cook J, and the valves K K, substantially as shown and described, and for the purposes set forth.

2. In an air or gas compressing pump, the combination of the cylinder, piston, connect ing-channel, and surrounding chamber and conduits,with a body of lubricating-fluid by which the heat is abstracted from the walls of the cylinders and transferred to the air or gas which ispassing through the chamber on its way to the pumps to be compressed, all substantially as shown and described, and for the purpose set forth.

. JOHN B. GLOT.

\Vitnesses:

SAML. DINSMORE, J NO. 0. QUINN. 

